GPT 5.1 Codex Mini
GPT 5.1 Codex Mini is the lightweight, fast variant in the GPT-5.1 codex family, optimized for routine coding tasks like bug fixes, feature scaffolding, and test generation at a cost that scales to high-frequency CI and development workflows.
ReasoningFile InputVision (Image)Tool UseImplicit Caching
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-codex-mini', prompt: 'Why is the sky blue?'})Providers
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
| Provider |
|---|
 Azure | 400K | 4.1s | 150tps | $0.25/M | $2.00/M | Read:$0.03/M Write:— | $14/K + input costs | — | +3 | 11/12/2025 | ||
 OpenAI | 400K | 0.5s | $0.25/M | $2.00/M | Read:$0.03/M Write:— | $10.00/K + input costs | — | +4 | 11/12/2025 |